Mill foe grinding



UNITED! sTATEs PATENT OFFICE.

DAVID PADDAGK, OF PONTIAC, MICHIGAN. i

MILL FOB., GRINDING.

Specification of Letters Patent No. 5,944, dated November 28, 1848.

To all whom t may concern:

Be it known that I, DAVID PADDACK, of Pontiac, in the county of Oakland and State of Michigan, have invented a new and improved mode ofL counteracting the heat caused by the friction of millstones in grinding, and of cooling and drying meal while in the process of grinding; and I do hereby declare that the following is a full and exact description.

The nature 0f my invention consists in providing the runner, or upper stone, with funnels and tubes, so constructed and arranged as to gather and force between the bed stone and the runner, currents of cool air, by the motion of the runner in grinding.

To enable others skilled in the art to'make and use my invention, I will proceed toV describe its construction and operation.

I cut any number of grooves desired, commencing near the skirt on the back, (repre-y -quarter of the distance from the center of the eye to the skirt. These grooves are cut from an inch to an inch and a half in dept-h, and o f about the same width, and dovetailing, or widest at the bottom on the face. The depth of the groove from the skirtto the eye should be deeper when necessary, so

that the bottom of the groove shall be as nearly level as may be., Into these grooves I insert tubes, b, b, c, c, of tin, copper, or any` other suitable material, so fitted to the grooves as to be secure, and of the width j and shape ofthe grooves, but of less depth, so that the tubes may be covered with cement, lead, or any other proper substance.

Into the upper end of these tubes, on the back of the runner I aliix square funnels a, a. By means of these funnels and tubes, the motion of the upper stone in. grinding concent-rates and casts between the twomill stones, so many currents of cool air as may be necessary, according to the slze and speed ofthe stone, to counteract the heat caused by the friction of the stones in grinding, and

to cool and dry the meal while in the process of grinding, so as to render it fit for boltingv in the stone. e

DAVID PADDACK.

IVitnesses f ELIJAH CARPENTER, W. C. PALMER. 

